<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryRef" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="分类名称" prop="name">
        <el-input v-model="queryParams.name" placeholder="请输入" clearable @keyup.enter="handleQuery" />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="Search" @click="handleQuery">搜索</el-button>
        <el-button icon="Refresh" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button type="primary" plain icon="Plus" @click="handleAdd"
          v-hasPermi="['course:courseCategory:add']">新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="info" plain icon="Sort" @click="toggleExpandAll">展开/折叠</el-button>
      </el-col>
      <right-toolbar v-model:showSearch="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-if="refreshTable" v-loading="loading" :data="categoryList" row-key="id"
      :default-expand-all="isExpandAll" :tree-props="{ children: 'children', hasChildren: 'hasChildren' }">
      <el-table-column type="index" label="序号" width="60" align="center" />
      <el-table-column label="分类名称" align="center" prop="name" />
      <el-table-column label="分类图标" align="center">
        <template #default="scope">
          <ImagePreview :src="scope.row.picUrl" :height="40" :width="40"></ImagePreview>
        </template>
      </el-table-column>
      <el-table-column label="排序" align="center" prop="sortNum" />
      <el-table-column label="状态" align="center">
        <template #default="scope">
          <dict-tag :options="sys_normal_disable" :value="scope.row.status" />
        </template>
      </el-table-column>
      <el-table-column label="创建时间" align="center" prop="createTime" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template #default="scope">
          <el-button link type="primary" icon="Edit" @click="handleUpdate(scope.row)"
            v-hasPermi="['course:courseCategory:edit']">修改</el-button>
          <el-button link type="primary" icon="Plus" @click="handleAdd(scope.row)"
            v-hasPermi="['course:courseCategory:add']">新增</el-button>
          <el-button link type="primary" icon="Delete" @click="handleDelete(scope.row)"
            v-hasPermi="['course:courseCategory:remove']">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 添加或修改课程分类对话框 -->
    <el-dialog :title="title" v-model="open" width="780px" append-to-body>
      <el-form ref="categoryRef" :model="form" :rules="rules" label-width="100px">
        <el-form-item label="选择父分类" prop="parentId">
          <el-tree-select v-model="form.parentId" :data="categoryOptions"
            :props="{ value: 'id', label: 'name', children: 'children' }" value-key="id" placeholder="请选择"
            check-strictly />
        </el-form-item>
        <el-form-item label="分类名称" prop="name">
          <el-input v-model="form.name" placeholder="请输入" />
        </el-form-item>
        <el-form-item label="分类图标" prop="picUrl">
          <image-upload title="分类图标" v-model="form.picUrl" :limit="1" />
        </el-form-item>
        <el-form-item label="分类排序" prop="sortNum">
          <el-input-number v-model="form.sortNum" :min="1" placeholder="请输入" />
        </el-form-item>
        <el-form-item label="状态" prop="status">
          <el-radio-group v-model="form.status">
            <el-radio v-for="dict in sys_normal_disable" :key="dict.value" :label="dict.value">{{ dict.label
              }}</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="备注" prop="remark">
          <el-input v-model="form.remark" type="textarea" placeholder="请输入内容" />
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button type="primary" @click="submitForm">确 定</el-button>
          <el-button @click="cancel">取 消</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script setup name="Category">
import { listCourseCategory, getCourseCategory, delCourseCategory, addCourseCategory, updateCourseCategory } from "@/api/course/courseCategory";

const { proxy } = getCurrentInstance();

const { sys_normal_disable } = proxy.useDict("sys_normal_disable");

const categoryList = ref([]);
const categoryOptions = ref([]);
const open = ref(false);
const loading = ref(true);
const showSearch = ref(true);
const title = ref("");
const isExpandAll = ref(true);
const refreshTable = ref(true);

const data = reactive({
  form: {},
  queryParams: {
    name: null,
    status: null,
  },
  rules: {
    name: [
      { required: true, message: "分类名称不能为空", trigger: "blur" }
    ],
    sortNum: [
      { required: true, message: "排序不能为空", trigger: "change" }
    ],
    status: [
      { required: true, message: "状态不能为空", trigger: "change" }
    ],
  }
});

const { queryParams, form, rules } = toRefs(data);

/** 查询课程分类列表 */
function getList() {
  loading.value = true;
  listCourseCategory(queryParams.value).then(response => {
    categoryList.value = proxy.handleTree(response.data, "id", "parentId");
    loading.value = false;
  });
}

/** 查询课程分类下拉树结构 */
function getTreeselect() {
  listCourseCategory().then(response => {
    categoryOptions.value = [];
    const data = { id: 0, name: '顶级节点', children: [] };
    data.children = proxy.handleTree(response.data, "id", "parentId");
    categoryOptions.value.push(data);
  });
}

// 取消按钮
function cancel() {
  open.value = false;
  reset();
}

// 表单重置
function reset() {
  form.value = {
    id: null,
    parentId: null,
    name: null,
    picUrl: null,
    sortNum: 1,
    status: '0',
    createBy: null,
    createId: null,
    createTime: null,
    updateBy: null,
    updateTime: null,
    remark: null,
    delFlag: null
  };
  proxy.resetForm("categoryRef");
}

/** 搜索按钮操作 */
function handleQuery() {
  getList();
}

/** 重置按钮操作 */
function resetQuery() {
  proxy.resetForm("queryRef");
  handleQuery();
}

/** 新增按钮操作 */
function handleAdd(row) {
  reset();
  getTreeselect();
  if (row != null && row.id) {
    form.value.parentId = row.id;
  } else {
    form.value.parentId = 0;
  }
  open.value = true;
  title.value = "添加课程分类";
}

/** 展开/折叠操作 */
function toggleExpandAll() {
  refreshTable.value = false;
  isExpandAll.value = !isExpandAll.value;
  nextTick(() => {
    refreshTable.value = true;
  });
}

/** 修改按钮操作 */
async function handleUpdate(row) {
  reset();
  await getTreeselect();
  if (row != null) {
    form.value.parentId = row.parentId;
  }
  getCourseCategory(row.id).then(response => {
    form.value = response.data;
    open.value = true;
    title.value = "修改课程分类";
  });
}

/** 提交按钮 */
function submitForm() {
  proxy.$refs["categoryRef"].validate(valid => {
    if (valid) {
      if (form.value.id != null) {
        updateCourseCategory(form.value).then(response => {
          proxy.$modal.msgSuccess("修改成功");
          open.value = false;
          getList();
        });
      } else {
        addCourseCategory(form.value).then(response => {
          proxy.$modal.msgSuccess("新增成功");
          open.value = false;
          getList();
        });
      }
    }
  });
}

/** 删除按钮操作 */
function handleDelete(row) {
  proxy.$modal.confirm('是否确认删除课程分类编号为"' + row.id + '"的数据项？').then(function () {
    return delCourseCategory(row.id);
  }).then(() => {
    getList();
    proxy.$modal.msgSuccess("删除成功");
  }).catch(() => { });
}

getList();
</script>